Billie Eilish Officiates Brother Finneas' Wedding To Claudia Sulewski In Star-Studded California Ceremony

Finneas O'Connell and Claudia Sulewski have officially tied the knot, marking a major milestone in their eight-year relationship. The intimate California wedding brought together family, close friends and a host of high-profile names, while Finneas' superstar sister Billie Eilish officiated the ceremony.

The Grammy-winning musician and producer married actress and creator Claudia Sulewski at San Ysidro Ranch in Santa Barbara, California, on Saturday. Rather than simply attending her brother's big day, Eilish stood at the centre of the ceremony as its officiant.

Finneas and Sulewski's dogs, Peaches and Moose, were also part of the celebrations, while their parents, Maggie Baird and Patrick O'Connell, watched their son exchange vows. A post shared by Relatable Girly Feed (@relatablegirlyfeed) The couple's guest list featured several well-known names from the entertainment world.

Justin Bieber and Hailey Bieber were among those present. The guest list also included Rachel Sennott, Emma Chamberlain, Rebecca Black, Jason Sudeikis, Kristen Bell, Dax Shepard, Devon Lee Carlson, Stassie Karanikolaou and others.

Eilish's boyfriend, Nat Wolff, also attended the celebrations. Sulewski made fashion a major part of her wedding weekend, wearing four Oscar de la Renta looks created for different moments of the celebrations. Her outfits included looks for the rehearsal dinner, ceremony, first dance and reception, as well as the after-party.

Vogue also documented her final fitting ahead of the wedding. The couple announced their engagement in September 2025, after seven years together. They shared the news through a joint Instagram post captioned "forever and ever 9.22." A post shared by CLAUDIA SULEWSKI (@claudiasulewski) After eight years together, the couple have now officially begun their married life, with Eilish playing an unusually close role in the ceremony.

Finneas O’Connell and Claudia Sulewski officially tied the knot in an intimate California wedding. They had been in an eight-year relationship. Finneas' superstar sister, Billie Eilish, officiated the wedding ceremony. She stood at the center of the event.

The couple's wedding took place at San Ysidro Ranch in Santa Barbara, California. It was an intimate gathering.